October in Heerlen averages a daily high of 15.4°C with nights around 7.8°C. Expect roughly 13.7 wet days totalling 63.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Heerlen is May–September.
Based on MAASTRICHT, NL (15.6km), 1995–2024. 30 years of October data.